In view of the unusual market activity in IsoRay's common stock on February 26 and 27, 2013, the New York Stock Exchange has contacted the Company in accordance with its usual practice. IsoRay stated that its policy is not to comment on unusual market activity.

About IsoRay IsoRay, Inc., through its subsidiary, IsoRay Medical, Inc. is the sole producer of Cesium-131 brachytherapy seeds, which are expanding brachytherapy options throughout the body. Learn more about this innovative Richland, Washington company and explore the many benefits and uses of Cesium-131 by visitingwww.isoray.com. Join us on http://www.facebook.com/#/Isoray. Follow us on https://twitter.com/#!/Isoray.